Bracket for printometers



0. E. BROWN.

BRACKET FOR PRINTOMETERS.

APPLICATION FILED DEC. 20, 1920.

1,423,182. Patentetfluly 18, 1922..

M 73%WMA arim UNITED STATES" PATENT OFFICE.*

cannon E. BROWN, or CHICAGO, rumors A BRACKET Fort PRINT ETERS.

TocZZ whom z'tmai concern Be it known that I, CARLTON E. BROWN,

a citizen of the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented a certain new and useful Improvement in Brackets for Print-- o1neters,of which the following is afull, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part ofthis specification. i This invention relatesto supports. The improvement herein described pertains to a support or bracket for use in retaining a cover on anQelectrical measuring instrument such asa printometer, relay or the like; the primary aim be ng to improve upon and: simplify theconstruction at present employed in retalning transparent or other covers on such instruments.

It has been customary in this particular instrument and in others oflike nature to secure a protective transparent cover thereon by means ofa bracket formed integrally rigidly. secured to the base. Quite often, the

bracket is fractured, which means putting the instrument out of service temporarily while repairsiare made; such repairs necessitating soldering a new bracket to the rigid part, which is in itself diflicult in the particular case.

In thisinstrument, the rigid part supporting the bracket is usuallya solenoid having a metal housing,which.solenoid is important in the functioning of the mechanism. On account of the location of the solenoid, the/job cannotbe made accurate, and furthermore, the heat of soldering is detrimental to the insulation of the winding. I

Briefly, my inventioncomprises a clamp which is adapted to detachably engage the solenoid, this clamp carrying a bracket for retention of the cover. Replacement of the bracket may be made quickly and Without retiring the: instrument from duty while repairs are being made. The clamp is spl t at one-or more points for easy application,

to the solenoid. Coupled with the feature of simplicity is the advantage of low cost of production, which while'perhaps necessitat ing a small additional expense in original cost of the instrument, compensates for this inobv-iating the necessity for retirement of the instrument while making; necessary re= ,pairs to this particular part. I

Specification of Letters I atent. Patented July 18, 1922, Application filed December 20, 1920. Serial No. 432,061. i

iWhile I have referred to and shall describe in detail a particular useof the invention, it will be evident that the essence of the invention is applicable to many other uses.

A moreconcrete understanding of my invention may be had from the following detailed description and the claims taken in connection with the accompanying drawings,- in which:

Figure 1 is a front elevational view of an 7 electrical measuring instrument, parts thereof omitted, showing the application of my showing, the old arrangement. with a mechan cal part of the instrument anism which are not concerned with the present invention have been omitted.

A printing solenoid 14: is mounted on the base, this solenoid bein carried in a metallic housing 15 supported by plates 16 and 17 having legs 18-18 and 1 919, respectively, these legs being provided with foot pieces QO-QOfor attachment to the base 10.

It will be apparent from an inspection of Figure 1, that the upper end of the solenoid 1.4 is adjacent the center ofthe transparent cover 12, and it will be noted from an inspection of Figurev 6 that in the old forum, a lug 22 is formed on the end plate 16. A post 23 is carried by the lug and is adapted to pass through the glass cover; This post 23 is providedwith a thumb-nut 24 which is adapted to engage the cover and prevent displacementthereof. A suitable opening is usually provided in the post v 28 and nut 24 through which a, suitable seal may be placed. The faultin this arrangement resides in the making" of the lug integral with the plate, which often be comes fractured and breaks at the point 25. The only way that the necessary repairs can be made is to solder another lug to the plate 16, and it will be quite obvious that this will throw the center of the post 23 out of alignment with the opening in the cover.

My invention overcomes these difiiculties, and comprises, in the present adaptation of the same, a two-part clamp consisting of the arcuate strap 26 and the segmental connecting strap 27. The strap could be made of one piece sprung over the solenoid and then clamped by a single bolt 81. The respective sections of the two-part clamp are adapted to embrace the metal housing 15 of the solenoid and abut the upper end plate 16 thereof, these sections being provided with complemental lugs 28-28 and :2929 respectively, which are connected by passing suitable bolts 30 and 31 therethrouglr The outer margins of the straps E26 and 27 are provided with radial inwardly directed lugs 32 and 33, respectively, said lugs engaging the outer face of the plate 16 and preventing longitudinal movement of the clamp on the metal housing of the solenoid. The lugs 33 are so positioned on the section 27 that they will engage the inner edges ol the legs 18-48 where the same connect with the plate 16 so as to effectually prevent rotative movement of the clamp on the solenoid, Of course these lugs might be omitted in the event that the clamp is made square for application to a solenoid having a square housing, but as the conventional form is cylindrical, the position of these lugs is an important feature of the invention, and therefore, their function is emphasized.

The supporting means for the cover is carried by a lug 3 1 which extends laterally outwardly from the clamp section 26 and comprises a stud 35 extending from said lug and provided with a threaded extremity 36 on which is threaded a thumb-nut 37. The stud 35 is provided with a longitudinal transverse slot 88, and a cooperative opening 39 is provided in the nut 87, so that a suitable sealing means may be applied. It is, 01'' course, to be understood that the stud 35 passes through the cover 12 approxi-' mately at its center point and the nut 37 applied to the projecting portion of the stud, thus retaining the cover effectually against displacement. i

It will be observed that the clamp for engaging the solenoid is prevented from rotating by virtue of the engagement of the lug 33 with the legs 1818 and is prevented from longitudinal displacement by the engagement of these lugswith the outer surface of the plate 16. Longitudinal movement outwardly of the clamp is prevented by virtue of its abutment with the plate at the points 40 and ll in Figure 5. Furthermore, this brings the connections between the sections oithe clamp out of the way of the printing rolls.

It will be observed that in case of fracture of the stud 35 or lug 84: the parts may be quickly and conveniently replaced while the instrument actually in operation. The bolts 30 and 31 are readily accessible by an ordinary screw-drive. The connections be tween the sections of the clamp are as shown.

The invention is not to be limited to printometers but is applicable to other instruments.

While I have shown and described my invention as embodying a preferred structure, and described a specific application of the structure, it will be understood that I do not limit myself to the specific details thereof except as imposed by the limitations of the appending claims.

I claim:

1. In a printometer, a base, operating mechanism including a solenoid mounted on the base, a bell-shaped glass cover for engaging the base and enclosing the operating mechanism, one end of the solenoid lying substantially under the center of the bellshaped cover, a post for holding the cover upon the base, and a separable clamp for clamping the end of the solenoid, said clamp supporting the post, and having ears for aligning the clamp upon the end of the sole noid and having screws for closing the .clamp.

2. In combination, a base, mechanism housed in a cylindrical part rigidly attached to said base, a cover for said mechanism, and a bracket detachably embracing said cylindrical part for retaining said cover on said base.

3. In combination, a base, mechanism having a cylindrical part rigidly attached to said base, a transparent cover for said mechanism, a circular two-part bracket detachahly embracing said cylindrical part, and means on said bracket for detachably engaging and retaining said cover.

4. In combination, a base, mechanism having a part rigidly attached to the base, a cover for said mechanism, a bracket detach ably engaging said rigid part for retaining the cover in place, and lugs on the bracket for preventing vibration and lateral displacement oi the same.

5. The combination with an electrical measuring instrument including a base and mechanism having a rigid part secured thereto, a cover for said mechanism, of means for retaining the cover comprising a two-part clamp for embracing said rigid part and a stud carried by one of the parts of said clamp for detachable engagement with the cover.

' 6. The combination with an electrical measuring instrumentincluding a base and mechanism having a rigid part secured thereto, and a cover for said'mechanism, of means for retaining the cover comprising a two-part clamp for embracing said rigid part, a stud carried by one of the parts of said clamp for detachable engagement with the cover, and means on one of the parts oi said clamp for engaging the rigid part of said mechanism for preventing lateral displacement of the clamp.

7. In combination, a base, mechanism on said base having a rigid part comprising a cylindrical body supported on end plates having legs engaged with the base, a cover for said mechanism, a clamp having detachably connected arcuate sections for embracing said cylindrical body, lugs formed with said clamp sections for engagement with one of the end plates of said cylindrical body and with said legs, and a stud projecting mounted on legs secured to said base, a cover for the mechanism, a clamp embracing said rigid part and being split below the center andabutting said legs, a marginal lug on one part of said clamp, a stud projectingv from said lug through said cover, and means on the stud for retaining the cover.

9. A clamp comprising a plurality of arcuate sections for embracing an object, said sections having complemental ears for receiving connecting means, a plurality of marginal inwardly directed radial lugs on each section, an additional lateral marginal lug on one of the sections, and a threaded stud carried by said lug.

In witness whereof, I hereunto subscribe my name this 16th day of December, 1920.

CARLTON E. BROWN. 

